package com.linkstec.util;  
  
import java.io.UnsupportedEncodingException;

import org.apache.log4j.Logger;

import sun.misc.*;  
  
public class Base64Util {
	
	private static Logger logger = Logger.getLogger(Base64Util.class);
    // 加密  
	public static String getBase64(String str) {  
        byte[] b = null;  
        String s = null;  
        try {  
            b = str.getBytes("utf-8");  
        } catch (UnsupportedEncodingException e) {  
            e.printStackTrace();  
        }  
        if (b != null) {  
            s = new BASE64Encoder().encode(b);  
        }  
        return s;  
    }  
  
    // 解密  
	public static String getFromBase64(String s) {  
        byte[] b = null;  
        String result = null;  
        if (s != null) {  
            BASE64Decoder decoder = new BASE64Decoder();  
            try {  
                b = decoder.decodeBuffer(s);  
                result = new String(b, "utf-8");  
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
        }  
        return result;
    }
    public static void main(String[] args) {
    	String bbb = getBase64("gtjamot");
    	logger.info("加密后：" + bbb);
    	String aaa = getFromBase64("Z3RqYW1vdA==");
    	logger.info("解密后：" + aaa);
	}
}